That brand’s heaviest laptop weighs less, not more, than the daily newspaper.
Explanation:
Commas are necessary before and after the words <em>not more</em>. <em>Not more</em> is another way to say <em>less. </em>When you use a word and then want to describe or explain it in other words (just like in this case), that description/explanation needs to be separated from the rest of the sentence by commas. This is why the given sentence should look like this:
<em>That brand’s heaviest laptop weighs less, not more, than the daily newspaper.</em>
A person is looking back at there actions or thoughts and thinking about them thoughtfully this help the person grow as they can learn from there mistakes and not make them again.